Wiesemann & Theis GmbH

Networking, sensors and interface technology for industry, office and IT

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Firmware:

Web-IO 4.0 Digital 4xRelay Out

#57151

Current firmware
Date Changes and comments Revision
June 11, 2026
  • Browser access - Improved request management
 1.81
UHD download
SHA-256 hash:
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Older firmware
Date Changes and comments Revision
April 21, 2026
  • Device Startup - Faster Boot Process
  • SSL/TLS - TLS stack updated
  • SSL/TLS - Update for crypto chip
  • SSL/TLS - Certificate management revamped
  • MQTT - Last Will Message Issues Resolved
  • SYSLOG - Added support for sending debug information
  • OPC UA - Library update
After this update, it will no longer be possible to revert to older firmware versions
 1.80
on request
November 25, 2025
  • Basic initialization at system startup revised
  • Watchdog timing optimized
  • LED control adapted
 1.78
on request
July 31, 2025
  • Internal data structure optimized
 1.76
on request
April 15, 2025
  • Firmware for the 0 series
 1.74
on request
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